Spraying booth and the like



Feb. 4, 1930. scHE 1,745,908

SPRAYING BOOTH AND THE LIKE Filed Sept. 13, 1926 4 Sheets-Sheet 1 Feb. 4, 1930. J. A. PAAscHE 1,745,908

SPRAYINQBOOTH AND THE LIKE Filed Sept. 15, 1926 4 Sheets-Sheet 2 l II l I l l l l Feb. 4, 1930. I

J. A. PAASCHE 1,745,908 SfRAYING BOOTH AND THE LIKE "Filed Sept. 15, 1926 4 Sheets- Sheet 3 Feb. 4, 1930. J. A. PAASCHE4 SPRAYING BOOTH AND THE LIKE Filed Sept. 13, 1926 4 Sheets-Sheet 4 Patented Feb. 4, 1930 PATENT or Flea JENS A. IPAASCHE, OF CHICAGO, ILLINOIS SPRAYING BOOTH AND THE LIKE Application filed September 13, 1926. Serial No. 135,092.

This invention has to do With improvements in booth'sfor spray painting and for similar operations wherein it is desired to make provision for the removal .of fumes or other noxious gases. It is well understood that in conducting spray painting operations considerable quantities of fumes and vapors are generated, which it is desired to remove by drawing them away from the workers. It is also desirable to remove these fumes and vapors in order to reduce the fire hazards and dangers to health and other dangers of operation as much as possible.

Considerable quantities 'of paint and the like are necessarily-carried along with the currents of air and vapors removed from the booth; and this paint and other materials presents a serious problem from the standpoint of keeping the mechanism at all times in perfect operating condition. This is because said paint and other materials soon become deposited 'to such a thickness as to either seriously obstruct the passages making the device costly to maintain and keep clean, increasing fire hazards, and in other ways interfering with the proper operation of themechinery.

One of the objects of the present invention is to provide a V-shaped sectional bafile cur- 0 tain shield through and about which the air and fumes must circulate in flowing from the booth to the point of discharge. This sectional V-shaped battle is so designed that when placed in position it provides six 90 degree air current turns and is so constructed that a very large portion of the paint and other materials carried in suspension will be deposited on the sectional V-shaped baffles from which they may be removed or cleaned from time'to time A further object in connection with the foregoing is to so construct this V-shaped battle that it shall be removable easily from the body of the booth itself. conveniently and with very little eifort on the part of the operator. This will make it possible to clean the shield from time to time, and at the same time will establish acousiderable incentive on the part of the operators to keep the same in clean and orkmanlike condition,

uniformly-shaped sections.

thereby safeguarding their health and eliminating fire risk.

A further feature in connection with the are furthermore so arranged that they can be easily reached from the front side of the painting booth, through which they may be removed one at a time. This will make it possible for a single operator to either remove or insert the sections without the help of'an assistant.

A further object in connection with the foregoing is 'to so arrange the sections that These sections.

the air flowing between them is compelled to turn through a large number of degree bends, more specifically, six right-angle bends of sharp dimensions. This will insure a most effective and thorough elimination of the suspended materials on to the flat surfaces.

A further object is that the V-shaped b'affies permit the current ofair to freely flow into and between the six 90 degree angles which widen from narrow in front to three times the inlet area in the rear so that the suction of the fan is not retarded and yet most of the material is collected in the battles without any loss of air circulation.

A further object of the invention is to provide a direct drive. motor-driven specially designed fan for drawing the air through the shield, said fan being so constructed that the current of air does not reach the motor itself, but is drawn directly to the fan, creating the necessary suction. The motor is placed in a separate compartment and the suction created by the fan tends to draw filtered air through this motor compartment, thereby efi'ectivelyicooling the motor and also making it absolutely impossible for the paint dust and other suspended materials to come in contact'with the motor, thereby doubling the life of the motor. In this connection, a further object is to provide a cleaner for cleaning the air so drawn past the motor, thereby eliminating dust and other impurities from it. This cleaner is also removable and can be kept in perfectly clean condition at a minimum effort on the part of the operator.

A further object in connection with the foregoing is to place the fan and draft-producing passages centrally at the rear side of the booth and at a point where theycan be readily reached for adjustment by the operator. A further obj cct isto arrange this mechanism in such a way that it can be readlly set for either right-hand or left-hand operation,-

thus greatly improving the flexibility and universal application of the mechanism.

A further object of the invention relates to the provision of a fire-protection spray device in the upper portion of the hood and at a point where it will be most effective to extinguish or localize fires which might start within the booth, thus reducing the fire hazard to a minimum.

Another feature of the invention relates to the provision of a spray painting booth of greatly improved construction, and which can be produced at a minimum cost and-readily packed. into a relatively small space for shipment.

Other objects and uses of the invention will appear from a detailed description of the same, which consists in the features of construction and combinations of parts hereinafter described and claimed.

In the drawings,

Fig. 1 shows a front face view of a spray painting booth embodying the features of the present invention;

Fig. 2 shows a plan view corresponding to Fig. 1; a I

Fig. 3 shows an end view looking at the right-hand ends of Figs. 1 and 2;

. Fig. 4 shows a perspective view of a number of battle plates as the same settogether in operative relationship; I

Fig. 5 shows a fragmentary, vertical section, being taken on the line 5-5 of Fig. 2 looking in the direction of the arrows, but on an enlarged scale; and

Fig. 6 shows a fragmentary, horizontal section, being taken on the line 6-6 of Fig. 3

- lookingin the direction of the arrows, but on an enlarged scale.

The booth proper comprises the sides 7 and 8, the top 9 and the floor 10. The front portions of the sides 7 and 8 extend substantially parallel to each other, but their upper edges are curved over and into a horizontal position to meet the top 9, as shown at 11 and 12, respectively. The front edges of the sides 7 and 8 are preferably protected by a sheet metal flange 13, which may be of angle iron or the like. Furthermore, it is preferred that the upper portions of the side walls be cut back on an angle of substantially fifteen degrees, so that the saidupper portion slopes backwardly, as shown in Fig. 3. It is also preferred that the roof 9 and the curved portions 11 and 12 be given an upward and backward slant, as clearly indicated in Fig. 3, so as to improve the operating conditions of the booth when in service. The rear portion of the structure is preferably drawn from both sides and from the top and and bottom towards a generally central location, where the motor and fan are placed, since this arrangement will insure a better removal of the air and suspended materials. For this purpose, the rear portion 14 includes the downwardly slanting roof portion 15, the upwardly sloping bottom portion 16, which reaches from the floor upwards, and the inwardly sloping side portions 17 and 18.- The top and bottom portions 15 and 16 are conveniently made of a continuous sheet of metal, as shown in Fig. 5, the central portion of the same being curved around on the same radius as is used for the fan and adjacent parts.

Preferably, a reinforcement member, such as an angle bar 19, is carried around the structure at the point where the rear section 14 joins on, so as to reinforce the parts, as shown in Figs. 2 and 3.

Extending across the extreme rear end of the section 14 is a tubular or semi-tubular member 20. The ends of the same are reinforced by circular plates 21 and 22, best shown'in Figs. 2, 3 and 5. This member 20 establishes a short, supplemental housing, the front'portion of which is indirect communication with the hood proper.

A' partition 23 reaches across the section 20 at the position of the reinforcing bar 21, so as to substantially close the structure at that side; but at the opposite side the member 20 is fully open to establishcommunication with a delivery flue or vent 24. This flue or vent 24 may be directly connected to the member 20 as a' continuation thereof, orit may be set into the circular plate 22 or constituting a portion thereof.

Immediately outside: of the partition 23 (see Fig; 6) is a conical housing 26, the larger end of which seats into an angle bar 27 in line with or constituting a portion of the. reinforcing member 21. This conical housing 26 serves as a housing for the driving member 28. Said motor is suitably supported within said housing; and the motor shaft or a projecting portion of the housing 29 reaches through an opening 30 in the partition 23 so as to carry the motor shaft 31 across the section 20 to the position of the beginning end of the flue 24.

Mounted upon the motor shaft 31, either in or immediately adjacent to the beginning end of the flue 24 is the fan 32. Said fan is directly driven by the motor, and, if desired, a bearing may be established for the motor shaft 31 adjacent to the fan. The fan is driven in such a direction that it tends totowards the flue. Thispartial vacuum also tends to draw air through the housing 26 and past the motor, and through the opening 30 Such air will serve to cool the motor and insure a constant supply of fresh air around the motor; besides which it will absolutely prevent any tendency for suspended material to be deposited on the motor, eliminating shprt circuiting or burning'out of the motor and doubling itsordinary life.

The smaller end of the conical housing is preferably protected and closed by a felt cover 33, through which the air must pass in reaching the motor. This cover 33 will effectively remove any suspended materials, such as dust, bronze powders, etc., from the air. and thus make it certain that the motor will at all times be subjected to a perfectly clean flow of air.

This felt sheet 33 may be supported in any convenient manner, as by means of a removable flange 34 of angle cross section. In fact, if desired, the edge portion of the felt sheet may be clamped between the two angle sections 34 and 35, and the entire unit can then be slipped or hinged on to the end of the comcal housing 26.

At a position intermediate between the body of the hoodproper and the draft appliance there is placed a V-shaped baflie screen '36. This battle is built up in the following manner:

Extending across the hood substantially at the middle of the tapering section 14 is a bottom channel member 37 and extending across immediately above the position of thls channel 37nis a pair of guide plates 38 and 39, which establish a'channel space-between. them. These plates 38 and 39 reach down low enough to allow the baffle sections to be dropped into the channel 37 without disengagement from the pl tes 38 and 39.

The baflie membeipzoper comprises a series of peculiarly-shape plates, which are best illustrated in Figs. 4 and 6. Each f these sections includes a cross plate 40 which is intended to stand'at an angle of substantially forty-five degrees to the general direction of the current of air flowing through the baflie section. The rear edge 41 of this plate 40 is unobstructed; but-its front edge is folded back and forth so as to provide a cross or T member 42. Reaching forwards from approximately the middle of the section40 is a partition 43 Whose front portion is folded over, as shown .at 44 and 45, to establish a channel at said front edge.

The various parts are so proportioned that when the consecutive units are set together theT plate 42 of each unit is partially embraced in the channel 44, 45 of the next succeeding unit, so that the air is compelled to travel'around a number of right-angle bends in flowing through the structure. This is clearly shown by the arrows in Fig. 6.

In order to insure proper consecutive spacing of the various units, I prefer to place lugs, such as 46, upon the upper and lower ends of the plates 43 adjacent to the-positions where said plates join to the companion plates 40. These parts are also so proportioned that when the units are set together the entire structure will be brought into proper harmony.

The various units or sections are made of a height somewhat greater than the vertical clearance between the floor of the channel 37 and thelower edges of the plates 38 and 39. Then each unit can be set into place by first setting its upper end between the plates 38 and 39 and then-raising the unit high enough to clear the edge of the channel 37. The unit can then be tilted backwards into the. vertical position shown by full lines in Fig. 5, and then allowed to drop into the working position.

It will be observedthat all of these units washing and without interference from sharp projections or rough surfaces.

Preferably, a suitable stand 47 is placed below the position of the central housing 20 so as to more effectively support thesame and eliminate any possibility of the entire booth tilting over backwards.

If desired, a fire sprayelement or nozzle 48 may be placed in the central portion of the top 9 of the hood. For this purpose, I

haveiprovided a conical enlargement 59 in the upper central portion ofthe top 9, said enlargement facing downwards into the booth. The nozzle 48, together with the necessary thermal element for controlling the same, is placed within said enlargement 49 and is supplied by water through a pipe 50. In case of an abnormal rise-of temperature within the booth, the fusible element will melt and allow the water spray to come into operation, so as to extinguish any fire within the booth. r While Ihave herein shown and described only a single embodiment of the features of my present invention, still I do not intend to limit myself thereto except as I may do so in the claims.

I claim:

1. In a spray painting booth the combination with a booth enclosure open at its front end, of a rear section for the same tapering towards a central vent discharge ly extending separated flanges in the upper portion of said tapering section and-in vertical alignment with the channel aforesaid, and a series of bafile members reaching between said channel and said flanges, each ballle member including a Vertical U-shaped sheet metal member having its open side facing rearwardly towards the direction of draft discharge and having oneleg substantially longer than the other, together with a vertical T-shaped sheet metal section having its body member secured to the edge of the longer Uleg aforesaid, and its T-arms lying parallel to and beyond but substantially "separated from said longer U-leg,together with suitable spacers, whereby said sections may be set together with the shorter Uleg of each section lying between the longer Uleg and the cross-arms of the T of the next adjoining section, to thereby establish a series of zigzag passages between the successivesections to permit the flow of draft between them,

and including a series of right angular bends in the path of the air flow, substantially as described.

' 2. In a spray painting booth the combination with a booth enclosure open at its front end, of a rear section for the same having a draft discharge connection together with means for inducing draft thereinto, and

means for removing paint and other sus-, pended materials from the current of air' flowing to said connectlon, sald means comprising an upwardly fastened channel across the, bottom of the lower channel and the lower edges of the upper flanges, and of less vertical dimension than the distance between the bottom of the lower channel and the top edges of the flanges, for the purpose specified, substantially as described. y

3. In a spray painting booth the combina tion of a booth open at its-front side, a rear section tapering towards a central rear discharge point, a rearward extension at said discharge point, a flue-reaching sidewise outwards from one side ofsaid extension, a motor housing reaching sidewise outwards from the other side of said rearward exten-' sion, a partition between said motor housing and said rearward extension having a central perforation, a motor within said motor housmg, a shaft reachmg from said motor across said extension to the position ofthe flue conpurpose of mechanically removing impurities from the air flowing into the motor housing, substantially as described. v

4. A spray painting booth open at its front side, a rear section for said booth, a rearward extenslon reaching rearwardly from said rear section, a flue connection at one side of said rearward extension, a motor housing at the other side of said rearward extension, a motor within said housing, a shaft reaching from said motor across the extension to a position in the flue connection, a fan on said shaft tending to place the extension and the motor housing under partial vacuum, and -means for mechanically removing suspended materials from the air flowing from the interior of the booth into said rearward extension, substantially as described.

JENS A. PAASCHE.

the lower portion of said section, together 1 with a pair of downwardly extending separated flanges across the upper portion of said section andin vertical alignment with said, channel, said flanges together establishing a downwardly facing channel of greater depth than the upwardly facing channel aforesaid, and a series of interlocking baflie members set into said lower channel and extending upwardly between, said flanges and 7 supported thereby, and establishing between them a series of zigzag passages for the removal of suspended material from the air current, said baflle members being of greater verticaldimension than the distance between 

